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Sound pressure level and Room size for ESLs

I am trying to calculate how the sound pressure level changes in respond to room size increase or decrease for electrostatic speakers (dipole). For example, if I am moving from a 1000 cubic ft room to 3000 cubic ft room, what increase in speaker efficiency (db) would be needed to generate the same sound level (assuming same distance from the speakers)? I suspect that this may depend on the frequency as bass frequency is omni directional, but I just wanted to get a rough idea. If some sound engineers can chime in, it would be very helpful.

thanks, Jay
128x128chungjh
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audiokinesis
2,729 posts
 
Which electrostat? Some approximate a point source, some approximate a line source, and some do it better than others (size matters). 

If the listening distance is the same then the SPL of the first-arrival sound will be the same, but as the room size grows the SPL of the reverberant sound decreases. Knowing which electrostat will help with approximating how much the reverberant sound’s contribution will change.

Duke
chungjh's avatar
chungjh OP
265 posts
 
Sound lab. Bigger the room, I am assuming that you will lose some bass frequency to the voids.
atmasphere's avatar
atmasphere
11,677 posts
 
I am assuming that you will lose some bass frequency to the voids.
I don't see why. Larger rooms shouldn't be any worse with bass. Standing waves are always an issue and are a problem in large rooms as they are in smaller rooms.
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